Chemistry
Grade-10
Easy
Question
Which of the following elements is not found in the bleaching powder?
- Calcium
- Chlorine
- Nitrogen
- Hydrogen
Hint:
The chemical composition of bleaching powder is Ca(ClO)2.
The correct answer is: Hydrogen
- The chemical composition of bleaching powder is Ca(ClO)2.
- It is basic in nature and strong oxidising agent.
- It gives calcium chloride, chlorine and water upon reaction with hydrochloric acid.
- Nitrogen is not found in the bleaching powder.
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(I). 
(II). 
(III). 
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II. Sodium hydroxide on being exposed to air reacts with the CO2 present in the air to form sodium carbonate.
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I. Bleaching powder is extensively used in the petroleum refining.
II. Sodium hydroxide on being exposed to air reacts with the CO2 present in the air to form sodium carbonate.
III. Sodium hydroxide can be used in the purification of bauxite (an aluminium ore) during the extraction process.
IV. Bleaching powder is acts as both oxidising as well as reducing agent due to presence of oxygen.
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Identify the X, Y, P, Q and R in the below figure.
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